330 THE STUDY OF PLANT COMMUNITIES ■ Chapter XII 



FlG. 176. This eroded stream bank in Wisconsin was graded, layed with 

 willow poles, and planted with a few willow sprouts. Only two seasons were 

 required to produce the growth shown in the second picture where under- 

 cutting is effectively stopped and shelter is provided for wildlife.— U. S. Soil 

 Conservation Service. 



